Most Helpful Girl
Most people gain a lot of followers by being active and becoming a "regular" user. Answer a lot of questions. Some people follow users who give good, well thought out advice. Others follow people who are funny or just give entertaining responses. So, just be yourself. It also helps if you don't go anonymous :)0
Most Helpful Guy
Here are some tips I can think of...
1.) Answer questions very well. Make sure you work hard to give answers that are well thought and respectful. When there is a serious question asked, answer the question with a serious answer. Don't jump to conclusions -- don't be that guy. Also, don't be that creepy guy that says overly sexual things on "Rate Me" questions.
2.) Be an active member. People will follow you when they start recognizing you. People are more willing to follow someone they've seen around vs some stranger they happened to see answering a question.
3.) Don't go anonymous. How are people supposed to follow you if they don't see your profile or know who you are?
4.) Don't be the local "village creep." I mentioned earlier about the how do I look section, but I also want to emphasize PMs. Don't be the guy that sends an unwanted dick pic to girls, and don't start talking super sexual to a bunch of girls who don't want to know about your nether regions.
5.) You'll be judged on your questions too. If you are that guy posting a bunch of rude/troll/antagonistic questions, no one is going to like you. Post questions-- sure, but for Pete's sake, be respectful as you post them.
6.) Feel free to mingle with the community. It's alright to talk to people who want to be talked with, comment on people's opinion, and make jokes with other GAGers. If you talk enough, who knows, you may gain yet a friend AND a follower.
7.) This is kind of an extra optional thing -- having a photo. I personally just took a random selfie and stuck it up on GAG one day when I was bored xD. If you take photo of yourself and post it up, it gives people a more intimate connection with you, and you'll get more followers. People like looking at a face and connecting the face with your opinions/comments/PMs, rather than some random silhouette who belongs in an old apple commercial.
On a side note, being attractive also helps if you are just going straight up for followers. Some people follow others just because they are attracted to them and are naturally drawn to the GAGer from it. Don't be a catfish (you'll get caught eventually!) but try and post a decent picture of yourself that you are proud of.
Hope this helps! Good luck in forming your GAG cult! hahaha3